Their run has brought both praise for and interest in several players, and manager Neil Lennon has expressed concerns over keeping some of his star players this summer.

Forster said: "There have been some fantastic performances - various performances will have caught the eye throughout the competition.

"We'll just have to wait and see what happens in the summer. I wouldn't be surprised if one or two faces leave, but no doubt we'll bring in a few as well."

The goalkeeper said Celtic's players had had their appetites whetted by the Champions League campaign and that the home defeat of Barca had been "something special with the atmosphere, and something that might only happen once in a lifetime".

And he added: "We're a very ambitious squad, and we're all hoping for more nights like that."